A federal judge ruled Wednesday that a lawsuit charging President Trump with violating an anti-corruption provision of the U.S. Constitution can proceed. The lawsuit, which was brought by the attorneys general of Baltimore and the District of Columbia, contends Trump violated the Constitution’s Emoluments Clause by receiving payments from foreign governments through the Trump International Hotel in Washington, D.C. It was the first-ever ruling by a federal court defining emoluments and could bolster two similar lawsuits targeting Trump’s business dealings.